Results 21 to 30 of about 54,691 (254)
IET Communications, 2021 In multi‐cell massive multiple‐input multiple‐output (MIMO) cellular networks, pilot contamination (PC) caused by ineluctable pilot reuse severely restricts the system performance in the effectiveness and reliability of transmission.
Wenbo Zeng +3 more
doaj +1 more source
Ant Colony-based Optimization algorithm to overcome the pilot contamination issue within multi-cell Massive MIMO systems [PDF]
E3S Web of Conferences, 2022 the pilot contamination (PC) issue still faces and limits the promising massive MIMO (mMIMO) technology, to unleash the high benefits of mMIMO, we provide here a new decontaminating strategy, which exploits the large-scale fading coefficients ...
Belhabib Abdelfettah +3 more
doaj +1 more source
A low complexity pilot assignment algorithm based on user polar coordinates in CF-mMIMO systems
Dianxin kexue, 2023 Absrtact: In order to reduce the pilot contamination in the cell-free massive multi-input multi-output (MIMO) system, a low complexity pilot assignment algorithm based on user polar coordinates was proposed.Firstly, a Gaussian weighted density algorithm ...
Shao GUO, Peng PAN, Yaozong FAN
doaj +2 more sources
IEEE Access, 2019 Massive multiple-input multiple-output (MIMO) system uses a large number of antennas in the base station (BS) serving a set of users in order to increase the spectral efficiency.
Islam Elsayed Shaalan +2 more
doaj +1 more source
Pilot Allocation Scheme for Pseudo-random Sequence Scrambling in Massive MIMO System
Journal of Harbin University of Science and Technology, 2021 In this paper，a scheme of joint polar coordinate pilot assignment and pseudo-random code pilot design is proposed to solve the pilot contamination caused by the reuse of the same pilot sequence in each cell of the Massive MIMO system.
HAN Zhi-yu +4 more
doaj +1 more source
A pilot program for assigned reading by residents in consultation psychiatry
Psychosomatics, 1986 Abstract To increase the likelihood of their reading pertinent literature, the 27 residents in five consultation-liaison (C-L) training programs were required to present written responses to short-answer, examination-type questions derived from articles previously linked to a set of teaching objectives in C-L psychiatry.
B L, Frankel +4 more
openaire +2 more sources
BMC Medical Education, 2023 Background The need for clinical placements outside traditional teaching hospitals for medical students is growing, both due to a decrease in hospital beds and the expansion of medical students.
Paul Pålsson +4 more
doaj +1 more source
Scalable Cell-Free Massive MIMO System: Joint Optimal Pilot and Access Point Assignment
IEEE AccessCell-free massive MIMO (CF-mMIMO) is a promising topology for 6G wireless networks which can potentially improve the network capacity. Pilot contamination, network overloading and scalability are the main challenges in the design of CF-mMIMO systems.
Mhammad B. Hmayed, Ali H. Bastami
doaj +1 more source
IEEE Access, 2015 In this paper, we study the joint pilot assignment and resource allocation for system energy efficiency (SEE) maximization in the multi-user and multi-cell massive multi-input multi-output network.
Tri Minh Nguyen +2 more
doaj +1 more source
EURASIP Journal on Wireless Communications and Networking, 2022 In this paper, we investigate the uplink transmission for user-centric cell-free massive multiple-input multiple-output (MIMO) systems. The largest-large-scale-fading-based access point (AP) selection method is adopted to achieve a user-centric operation.
Chen Wei +5 more
doaj +1 more source